A Controllable Material Removal Strategy Considering Force-Geometry Model in Marine Propeller Five-Axis Belt Grinding

2014 ◽  
Vol 1017 ◽  
pp. 44-49 ◽  
Author(s):  
Yong Qing Wang ◽  
B. Hou ◽  
Q. Ma ◽  
H.B. Liu ◽  
Xian Jun Sheng
Keyword(s):  
Material Removal ◽  
Dwell Time ◽  
Elastic Contact ◽  
Aluminum Bronze ◽  
Marine Propeller ◽  
Cast Aluminum ◽  
Surface Geometry ◽  
Belt Grinding ◽  
Geometry Model ◽  
Five Axis

Belt grinding is characterized by elastic contact grinding. Generally, the non-uniform material in complex machining area could be removed by repeated grinding or longer dwell-time grinding to obtain the required grinding capacity, which leads to low efficiency, difficult dimension accuracy control and poor surface quality. It should be considered thoroughly surface geometry, grinding force and system stiffness in surface belt grinding. Belt grinding parameters can be then dynamically adjusted. This paper focuses on controlling material removal efficiently and uniformly in marine propeller belt grinding. The material removal process is modelled considering elastic contact between grinding wheel and workpiece. Then, a grinding depth and grinding dwell time control strategy of surface belt grinding is proposed based on rigid-flexible coupled analysis. The variable feed grinding experiments were carried out on the developed five-axis CNC belt grinding machine integrated measuring and machining. The marine propeller with cast aluminum bronze (ZCuAl8Mn13Fe3Ni2) was employed to validate the proposed controllable material removal strategy. It is shown that the proposed strategy is feasible and efficient.

The Analysis of Four-Axis Belt Grinding for Marine Propeller Blade

2010 ◽  
Vol 154-155 ◽  
pp. 647-653
Author(s):  
Jian Qiang Wu ◽  
Yun Huang ◽  
Zhi Huang
Keyword(s):  
Material Removal Rate ◽  
Material Removal ◽  
Removal Rate ◽  
Structural Features ◽  
Free Form ◽  
Marine Propeller ◽  
Propeller Blade ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Grinding Machine

Marine propeller blade is composite of the free form surface, its machining method has been a difficult thing. The blade is processed by 4-axis belt grinding machine in this experiment, this paper analyze that the wear of the abrasive belt and the processing precision and the material removal rate of the blade according to the grinding performance of the blade material, the structural features of the vane, and the theory of 4-aixs belt grinding machine. Draw formulas with time for the belt wear height and the actual grinding depth. The life expectancy of the ceramic abrasive belt is the longest, and its the material removal rate is maximum in Three kinds of belt，and when the belt line speed is 30m/s or so, the material removal rate is maximum.

scholarly journals A Surface Geometry Model for LiDAR Depth Completion

2021 ◽  
pp. 1-1
Author(s):  
Yiming Zhao ◽  
Lin Bai ◽  
Ziming Zhang ◽  
Xinming Huang
Keyword(s):  
Surface Geometry ◽  
Geometry Model

Distributed-Parameter Modeling for Geometry Control of Manufacturing Processes With Material Deposition

1998 ◽  
Vol 122 (1) ◽  
pp. 71-77 ◽  
Author(s):  
Charalabos Doumanidis ◽  
Eleni Skordeli
Keyword(s):  
Solid Freeform Fabrication ◽  
Surface Topology ◽  
Distributed Parameter ◽  
Surface Geometry ◽  
Mass Source ◽  
Freeform Fabrication ◽  
Geometry Model ◽  
Material Deposition ◽  
Solid Objects ◽  
3D Solid

Recent solid freeform fabrication methods generate 3D solid objects by material deposition in successive layers made of adjacent beads. Besides numerical simulation, this article introduces an analytical model of such material addition, using superposition of unit deposition distributions, composed of elementary spherical primitives consistent with the mass transfer physics. This real-time surface geometry model, with its parameters identified by in-process profile measurements, is used for Smith-prediction of the material shape in the unobservable deposition region. The model offers the basis for a distributed-parameter geometry control scheme to obtain a desired surface topology, by modulating the feed and motion of a moving mass source. The model was experimentally tested on a fused wire deposition welding station, using optical sensing by a scanning laser stripe. Its applications to other rapid prototyping methods are discussed. [S0022-0434(00)02301-7]

The Impact of Hardened Steel Milling Surface Structure on Mould Service Load

2014 ◽  
Vol 800-801 ◽  
pp. 342-347
Author(s):  
Min Li Zheng ◽  
Jin Hui Xu ◽  
Wei Zhang ◽  
Zhao Xing Zhang ◽  
Tong Wu
Keyword(s):  
Hardened Steel ◽  
Surface Load ◽  
Surface Geometry ◽  
Surface Loading ◽  
Machined Surface ◽  
Geometry Model ◽  
Geometry Structure ◽  
Mould Surface ◽  
Service Load ◽  
The Impact

Mould surface loading state is one of the most important factors which would affect the mould performance in the course of service. According to the established hardened steel milling surface geometry model, a bending forming numerical simulation of hardened steel milling is conducted, the influence law of service process surface load state is analyzed under machined surface geometry structure which is formed by different milling parameters. The research results show: surface load concentrated area is mainly focusing on mould edge transition and fillet in the course of service; the surface geometry structure has an important influence on the mould service load in the course of service, service load more smaller which is more helpful to improve the mould service performance in the course of service.

Optimization of Coated SiC Belt Grinding of Alumina Ceramics

2009 ◽  
Vol 76-78 ◽  
pp. 38-42 ◽  
Author(s):  
Xavier Kennedy ◽  
S. Gowri
Keyword(s):  
Surface Roughness ◽  
Material Removal ◽  
High Hardness ◽  
Surface Damage ◽  
High Temperature Strength ◽  
Structural Ceramics ◽  
Alumina Ceramics ◽  
Belt Grinding ◽  
Grinding Parameters ◽  
Surface Damages

Advanced structural ceramics have been increasingly used in automotive, aerospace, military, medical and other applications due to their high temperature strength, low density, thermal and chemical stability. However, the Grinding of advanced ceramics such as alumina is difficult due to its low fracture toughness and sensitivity to cracking, high hardness and brittleness. In this paper, surface integrity and material removal mechanisms of Alumina ceramics ground with SiC abrasive belts, have been investigated. The surface damage have been studied with scanning electron microscope (SEM). The significance of grinding parameters on the responses was evaluated using Signal to Noise ratios.This research links the surface roughness and surface damages to grinding parameters. The optimum levels for maximum material removal and surface roughness been discussed.

FSI Analysis the Dynamic Performance of Composite Propeller

2018 ◽  
Author(s):  
Fanchen Zhang ◽  
Jianjun Ma
Keyword(s):  
Composite Materials ◽  
Dynamic Performance ◽  
High Yield ◽  
Maintenance Cost ◽  
Aluminum Bronze ◽  
Nickel Aluminum ◽  
Marine Propeller ◽  
Marine Propellers ◽  
Superior Corrosion Resistance ◽  
Nickel Aluminum Bronze

The marine propeller is regarded as critical component with regard to the performance of the ships and torpedoes. Traditionally marine propellers are made of manganese-nickel-aluminum-bronze (MAB) or nickel-aluminum-bronze (NAB) for superior corrosion resistance, high-yield strength, reliability, and affordability. Since the composite materials can offer the potential benefits of reduced corrosion and cavitation damage, improved fatigue performance, lower noise, improved material damping properties, and reduced lifetime maintenance cost, Many researches on the application of the composite materials for marine propeller had been conducted. In this work, the INSEAN 1619 large screw 7 bladed propeller is analyzed, to explore the hydrodynamic and structural performance of composite materials effect on propeller’s performances, The commercial software ANSYS Workbench was used in this research. The coupled FSI method was used to analysis the dynamic performance of INSEAN 1619 large screw 7 bladed propeller made of different materials. The simulation results show that the effect of fluid–structure interaction in the analysis of flexible composite propellers should be considered.

Microstructures and Mechanical Properties of Cast Aluminum Bronze Enhanced by Modified Nano-SiC Powders

2011 ◽  
Vol 335-336 ◽  
pp. 396-399
Author(s):  
Jun Yang ◽  
Mei Ling Chen ◽  
Hong Gao
Keyword(s):  
Mechanical Properties ◽  
Aluminum Bronze ◽  
Cast Aluminum ◽  
Β Phase ◽  
Microstructures And Mechanical Properties ◽  
Strength And Toughness

The microstructures and mechenical properties were studied of the reinforced cast aluminum bronze by modified nano-SiC powders have been invastigated in this paper. The results show that the structures and fractograph of the samples are obviously refined, and the β phase was obviously reduced, while the strength and toughness are significantly increased by 14% and 51% simultaneously.

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